EP2795768B1 - Drive unit comprising a geared motor - Google Patents

Drive unit comprising a geared motor Download PDF

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Publication number
EP2795768B1
EP2795768B1 EP12798610.7A EP12798610A EP2795768B1 EP 2795768 B1 EP2795768 B1 EP 2795768B1 EP 12798610 A EP12798610 A EP 12798610A EP 2795768 B1 EP2795768 B1 EP 2795768B1
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EP
European Patent Office
Prior art keywords
ring
oil
sealing ring
shaft sealing
electric motor
Prior art date
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Active
Application number
EP12798610.7A
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German (de)
French (fr)
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EP2795768A2 (en
Inventor
Abdulvahap ÖZCAN
Friedrich Boermann
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SEW Eurodrive GmbH and Co KG
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SEW Eurodrive GmbH and Co KG
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Publication of EP2795768A2 publication Critical patent/EP2795768A2/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/124—Sealing of shafts

Definitions

  • the invention relates to a drive comprising a geared motor.
  • a drive comprising a geared motor
  • the geared motor having an electric motor and a gearbox
  • the rotor shaft being supported in a bearing flange via a bearing and is sealed against the bearing flange by means of a shaft sealing ring provided on the bearing flange, whereby oil is provided on the output side
  • a slinger is connected to the rotor shaft in a rotationally fixed manner, to which a discharge ring connected to a housing part is assigned, wherein the slinger is arranged axially on the side of the shaft sealing ring facing the rotor of the electric motor, wherein the rotor shaft axis is oriented essentially parallel to the axis of gravity wherein the discharge ring forms a circumferential groove in which the thrown-off oil is collected, a bore being arranged radially outward from said channel.
  • the invention is therefore based on the object of developing a drive, the aim being to improve safety.
  • the rotor shaft is mounted in a bearing flange via a bearing and is sealed against the bearing flange by means of a shaft sealing ring provided on the bearing flange, whereby oil is provided on the output side, wherein a slinger is connected to the rotor shaft in a rotationally fixed manner, to which a discharge ring connected to a housing part is assigned, wherein the slinger is arranged axially on the side of the shaft sealing ring facing the rotor of the electric motor.
  • the advantage here is that in the event of a leak, the oil flows along the rotor shaft past the shaft sealing ring and reaches the centrifugal ring. Since this has a higher outer radius than the rotor shaft, oil is thrown off into the diverter ring, which surrounds the centrifugal ring on the outside, or the oil flows off to the diverter ring at the inclined edge, in particular the cone. Thus, when the gearbox is not rotating, the oil flows off the cone and drips into the recess of the diverter ring. When the gearbox is rotating, however, the oil is thrown off into the recess of the discharge ring.
  • the slinger has such a bevel on its surface facing the shaft sealing ring that the radial distance of the surface increases monotonically or strictly monotonically with increasing axial distance from the shaft sealing ring, up to the surface point which has the greatest radial distance.
  • the advantage here is that the oil can drain off even when the gear unit is not rotating.
  • the slope is designed in such a way that the radial distance increases proportionally with increasing axial distance from the shaft sealing ring.
  • a rounding can also be provided at the radially outer end.
  • the slinger has an annular recess on its surface facing away from the shaft sealing ring, in particular into which an at least in the axial direction protruding elevation of the discharge ring extends at least partially.
  • a collecting channel is formed by means of the recess.
  • the diverter ring has, on its side facing the shaft sealing ring, a circumferential recess into which a bore arranged in the bearing flange opens.
  • the advantage of the invention is that it can be diverted into a connection device for a hose or for a pipe.
  • the nipple is used as the connection device for this purpose.
  • the rotor of the electric motor has a permanent magnet and / or a short-circuit cage as the active part.
  • the advantage here is that the motor can be designed as a synchronous motor or asynchronous motor.
  • the advantage of the invention is that penetration of the oil into the area of the active part or further axially is prevented. This means that components that are axially further away from the shaft seal can also be protected from the oil.
  • the advantage of the invention is that the angle sensor can be equipped with optical detection means. Because the oil cannot get to the angle sensor because it has already been caught by the slinger.
  • the advantage of the invention is that the oil can drain off even when the engine is not rotating, since the slinger has a bevel, in particular a conical shape, so that the oil flows off along the rotor shaft and then along the bevel.
  • the advantage of the invention is that the security is increased. This is because even if oil penetrates into the engine compartment due to a leakage, the oil is drained off.
  • the electric motor has a rotor shaft 11 on which a slinger 1 is connected in a rotationally fixed manner.
  • a discharge ring 2 is connected to the stator housing 16 for discharging the oil thrown off or dripping off by the slinger 1.
  • a connector part 3 for power supply and a connector part 4 for signal transmission from the angle sensor 5 connected to the rotor shaft 11 are also provided on the housing of the electric motor.
  • not only the angle sensor 5 but also an electromagnetically actuated brake is arranged on the side of the electric motor facing away from the transmission, the brake coil 6 of which is connected to the housing of the electric motor and thus also to the stator housing part 16.
  • Permanent magnets 7 are arranged on the rotor shaft 11 as active elements for generating the motor torque.
  • the rotor shaft 11 is mounted in the housing of the motor via a bearing 9 on the brake side and in the bearing flange 13 connected to the housing of the motor via a bearing 8 on the transmission side.
  • the bearing flange 13 is connected to the gear housing 10.
  • a shaft sealing ring 12 is provided between the bearing flange 13 and the rotor shaft 11, which seals the inside of the gear unit, which is filled with lubricating oil, from the inside of the motor.
  • the shaft sealing ring 12 is arranged in the bearing flange. A sealing lip of the shaft sealing ring 12 runs on the rotor shaft 11.
  • the slinger 1 is arranged on the rotor shaft 11.
  • the lubricating oil that has penetrated must therefore run radially outward along the slinger 1.
  • greater circumferential speeds prevail at a higher radial distance, the oil is thrown off from there.
  • the thrown-off oil is collected in a circumferential groove of the discharge ring 2.
  • a bore 15 is arranged radially outward from this channel, which opens into a channel 14 of a nipple 17 according to the invention which is screw-connected to the bearing flange 13.
  • a hose is provided on the outside of the nipple 17 for further drainage of the oil.
  • the slinger 1 has an outer contour with a bevel.
  • the greatest radial distance on the surface of the slinger 1, in particular at least in its radially outer end region, increases with increasing axial distance from the transmission, i.e. from the output side of the motor, in particular monotonically or even strictly monotonously.
  • the transmission is arranged higher than the brake, so according to the invention the rotor shaft axis is essentially parallel to the axis of gravity.
  • a circumferential recess in particular a groove, is arranged on the side of the slinger 1 facing away from the gear or the output side.
  • An elevation of the diverting ring 2 is assigned axially opposite this groove.
  • the discharge ring 2 has a contour as a channel in which the radial distance increases monotonically or even strictly monotonically with increasing axial distance from the gear or from the drive side.
  • This provides security against oil escaping in the event of a leak in the shaft sealing ring.
  • slinger rings 1 are arranged axially one behind the other to further increase safety.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Description

Die Erfindung betrifft einen Antrieb, umfassend einen Getriebemotor.The invention relates to a drive comprising a geared motor.

Es ist allgemein bei Getriebemotoren bekannt, ein schmierölbefülltes Getriebe einzusetzen, die zur Abdichtung des Getriebeinneren gegen die Umgebung einen Wellendichtring aufweisen.It is generally known in geared motors to use a lubricating oil-filled gearbox which has a shaft sealing ring to seal the interior of the gearbox from the environment.

Aus der JP S 56 150943 A ist ein Antrieb, umfassend Getriebemotor, offenbart, wobei der Getriebemotor einen Elektromotor und ein Getriebe aufweist, wobei die Rotorwelle über ein Lager in einem Lagerflansch gelagert ist und
mittels eines am Lagerflansch vorgesehenen Wellendichtrings gegen den Lagerflansch abgedichtet ist,
wobei abtriebsseitig Öl vorgesehen ist,
wobei mit der Rotorwelle ein Schleuderring drehfest verbunden ist, welchem ein mit einem Gehäuseteil verbundener Ableitring zugeordnet ist,
wobei der Schleuderring axial auf der dem Rotor des Elektromotors zugewandten Seite des Wellendichtrings angeordnet ist,
wobei die Rotorwellenachse im Wesentlichen parallel zur Gravitationsachse ausgerichtet ist
wobei der Ableitring eine in Umfangsrichtung umlaufende Rinne ausbildet, in der das abgeschleuderte Öl aufgefangen wird,
wobei von besagter Rinne nach radial außen eine Bohrung angeordnet ist.From the JP S 56 150943 A a drive comprising a geared motor is disclosed, the geared motor having an electric motor and a gearbox, the rotor shaft being supported in a bearing flange via a bearing and
is sealed against the bearing flange by means of a shaft sealing ring provided on the bearing flange,
whereby oil is provided on the output side,
wherein a slinger is connected to the rotor shaft in a rotationally fixed manner, to which a discharge ring connected to a housing part is assigned,
wherein the slinger is arranged axially on the side of the shaft sealing ring facing the rotor of the electric motor,
wherein the rotor shaft axis is oriented essentially parallel to the axis of gravity
wherein the discharge ring forms a circumferential groove in which the thrown-off oil is collected,
a bore being arranged radially outward from said channel.

Aus der JP H 06 253495 A ist ein Schmiernippel für einen vertikal montierten Elektromotor bekannt.From the JP H 06 253495 A a grease nipple for a vertically mounted electric motor is known.

Aus der JP H 021 04753 U ist eine Dichtungsanordnung für eine Welle bekannt.From the JP H 021 04753 U a sealing arrangement for a shaft is known.

Aus der DE 10 2005 009 601 A1 ist ein Verfahren zur Überwachung eines Antriebs bekannt.From the DE 10 2005 009 601 A1 a method for monitoring a drive is known.

Aus der US 6 376 949 B1 ist ein elektrischer Motor mit Flüssigkeitsdrainage-Schnittstelle bekannt.From the US 6,376,949 B1 an electric motor with a fluid drainage interface is known.

Aus der DE 353 322 C ist eine Vorrichtung zum Abdichten einer durch zwei Räume geführten Welle bekannt.From the DE 353 322 C a device for sealing a shaft guided through two spaces is known.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Antrieb weiterzubilden, wobei die Sicherheit verbessert sein soll.The invention is therefore based on the object of developing a drive, the aim being to improve safety.

Erfindungsgemäß wird die Aufgabe bei dem Antrieb nach den in Anspruch 1 angegebenen Merkmalen gelöst.According to the invention, the object is achieved in the drive according to the features specified in claim 1.

Wichtige Merkmale der Erfindung bei dem Antrieb, umfassend Getriebemotor, sind, dass die Rotorwelle über ein Lager in einem Lagerflansch gelagert ist und mittels eines am Lagerflansch vorgesehenen Wellendichtrings gegen den Lagerflansch abgedichtet ist,
wobei abtriebsseitig Öl vorgesehen ist,
wobei mit der Rotorwelle ein Schleuderring drehfest verbunden ist, welchem ein mit einem Gehäuseteil verbundener Ableitring zugeordnet ist,
wobei der Schleuderring axial auf der dem Rotor des Elektromotors zugewandten Seite des Wellendichtrings angeordnet ist.Important features of the invention in the drive, comprising the geared motor, are that the rotor shaft is mounted in a bearing flange via a bearing and is sealed against the bearing flange by means of a shaft sealing ring provided on the bearing flange,
whereby oil is provided on the output side,
wherein a slinger is connected to the rotor shaft in a rotationally fixed manner, to which a discharge ring connected to a housing part is assigned,
wherein the slinger is arranged axially on the side of the shaft sealing ring facing the rotor of the electric motor.

Von Vorteil ist dabei, dass bei Leckage das Öl entlang der Rotorwelle am Wellendichtring vorbei fließt und zum Schleuderring gelangt. Da dieser einen höheren Außenradius aufweist als die Rotorwelle, wird Öl abgeschleudert in den Ableitring, welcher den Schleuderring außen umgibt, oder das Öl fließt an der schrägen Kante, insbesondere Konus, ab zum Ableitring. Somit fließt das Öl bei nicht drehendem Getriebe an dem Konus ab und tropft in die Vertiefung des Ableitrings. Bei drehendem Getriebe hingegen wird das Öl abgeschleudert in die Vertiefung des Ableitrings.The advantage here is that in the event of a leak, the oil flows along the rotor shaft past the shaft sealing ring and reaches the centrifugal ring. Since this has a higher outer radius than the rotor shaft, oil is thrown off into the diverter ring, which surrounds the centrifugal ring on the outside, or the oil flows off to the diverter ring at the inclined edge, in particular the cone. Thus, when the gearbox is not rotating, the oil flows off the cone and drips into the recess of the diverter ring. When the gearbox is rotating, however, the oil is thrown off into the recess of the discharge ring.

Erfindungsgemäß weist der Schleuderring auf seiner dem Wellendichtring zugewandten Oberfläche eine derartige Schrägung auf, dass der Radialabstand der Oberfläche mit zunehmendem axialen Abstand vom Wellendichtring monoton oder streng monoton zunimmt, bis zu demjenigen Oberflächenpunkt, welcher den höchsten Radialabstand aufweist. Von Vorteil ist dabei, dass ein Abfließen des Öls auch bei nicht drehendem Getriebe bewirkbar ist. Vorzugsweise ist die Schräge derart ausgeführt, dass der Radialabstand mit zunehmendem axialen Abstand zum Wellendichtring proportional zunimmt. Am radial äußeren Ende ist auch eine Rundung vorsehbar.According to the invention, the slinger has such a bevel on its surface facing the shaft sealing ring that the radial distance of the surface increases monotonically or strictly monotonically with increasing axial distance from the shaft sealing ring, up to the surface point which has the greatest radial distance. The advantage here is that the oil can drain off even when the gear unit is not rotating. Preferably the slope is designed in such a way that the radial distance increases proportionally with increasing axial distance from the shaft sealing ring. A rounding can also be provided at the radially outer end.

Bei einer vorteilhaften Ausgestaltung weist der Schleuderring auf seiner vom Wellendichtring abgewandten Oberfläche eine ringförmige Vertiefung auf,
insbesondere in welche eine zumindest in axialer Richtung hervorragende Erhebung des Ableitrings zumindest teilweise hineinreicht. Von Vorteil ist dabei, dass mittels der Vertiefung ein Sammelkanal gebildet ist.In an advantageous embodiment, the slinger has an annular recess on its surface facing away from the shaft sealing ring,
in particular into which an at least in the axial direction protruding elevation of the discharge ring extends at least partially. The advantage here is that a collecting channel is formed by means of the recess.

Bei einer vorteilhaften Ausgestaltung weist der Ableitring an seiner dem Wellendichtring zugewandten Seite eine umlaufende Vertiefung auf, in welche eine im Lagerflansch angeordnete Bohrung mündet. Von Vorteil ist dabei, dass ein Ableiten des Öls in den Außenraum ermöglicht ist.In an advantageous embodiment, the diverter ring has, on its side facing the shaft sealing ring, a circumferential recess into which a bore arranged in the bearing flange opens. The advantage here is that the oil can be diverted into the outside space.

Von Vorteil ist bei der Erfindung, dass ein Ableiten in eine Anschlussvorrichtung für einen Schlauch oder für ein Rohr ermöglicht ist. Hierzu ist als Anschlussvorrichtung der Nippel verwendet.The advantage of the invention is that it can be diverted into a connection device for a hose or for a pipe. The nipple is used as the connection device for this purpose.

Bei einer vorteilhaften Ausgestaltung weist der Rotor des Elektromotors als Aktivteil einen Dauermagnet und/oder einen Kurzschlusskäfig auf. Von Vorteil ist dabei, dass der Motor als Synchronmotor beziehungsweise Asynchronmotor ausführbar ist.In an advantageous embodiment, the rotor of the electric motor has a permanent magnet and / or a short-circuit cage as the active part. The advantage here is that the motor can be designed as a synchronous motor or asynchronous motor.

Von Vorteil ist bei der Erfindung, dass ein Eindringen des Öls in den Bereich des Aktivteils oder axial weiter verhindert ist. Somit sind auch axial weiter vom Wellendichtring entfernt angeordnete Komponenten schützbar vor dem Öl.The advantage of the invention is that penetration of the oil into the area of the active part or further axially is prevented. This means that components that are axially further away from the shaft seal can also be protected from the oil.

Von Vorteil ist bei der Erfindung, dass der Winkelsensor mit optischen Erfassungsmitteln ausstattbar ist. Denn das Öl kann nicht bis zum Winkelsensor gelangen, da es schon von dem Schleuderring abgefangen ist.The advantage of the invention is that the angle sensor can be equipped with optical detection means. Because the oil cannot get to the angle sensor because it has already been caught by the slinger.

Von Vorteil ist bei der Erfindung, dass auch bei nicht drehendem Motor ein Abfließen des Öls ermöglicht ist, da der Schleuderring eine Schräge, insbesondere Konusform, aufweist, so dass das Öl entlang der Rotorwelle und dann entlang der Schräge abfließt.The advantage of the invention is that the oil can drain off even when the engine is not rotating, since the slinger has a bevel, in particular a conical shape, so that the oil flows off along the rotor shaft and then along the bevel.

Von Vorteil ist bei der Erfindung, dass die Sicherheit erhöht ist. Denn selbst bei einem Leckagebedingten Eindringen von Öl in den Motorinnenraum ist ein Ableiten des Öls erreicht.The advantage of the invention is that the security is increased. This is because even if oil penetrates into the engine compartment due to a leakage, the oil is drained off.

Weitere Vorteile ergeben sich aus den Unteransprüchen.Further advantages result from the subclaims.

Die Erfindung wird nun anhand von Abbildungen näher erläutert:

  • In der Figur 1 ist ein erfindungsgemäßes Ausführungsbeispiel in Schrägansicht gezeigt, wobei der erfindungsgemäße Elektromotor angeschnitten ist.
  • In der Figur 2 ist ein vergrößerter Ausschnitt der Figur 1 gezeigt.
  • In der Figur 3 ist eine zugehörige Schnittansicht gezeigt.
The invention will now be explained in more detail with reference to figures:
  • In the Figure 1 an embodiment according to the invention is shown in an oblique view, with the electric motor according to the invention being cut.
  • In the Figure 2 is an enlarged section of the Figure 1 shown.
  • In the Figure 3 an associated sectional view is shown.

Der Elektromotor weist eine Rotorwelle 11 auf, auf der ein Schleuderring 1 drehfest verbunden ist.The electric motor has a rotor shaft 11 on which a slinger 1 is connected in a rotationally fixed manner.

Am Statorgehäuse 16 ist ein Ableitring 2 verbunden zum Ableiten des vom Schleuderring 1 abgeschleuderten oder abtropfenden Öls.A discharge ring 2 is connected to the stator housing 16 for discharging the oil thrown off or dripping off by the slinger 1.

Am Gehäuse des Elektromotors ist außerdem ein Steckverbinderteil 3 für Leistungsversorgung und ein Steckverbinderteil 4 für Signalübertragung des an der Rotorwelle 11 verbundenen Winkelsensors 5 vorgesehen.A connector part 3 for power supply and a connector part 4 for signal transmission from the angle sensor 5 connected to the rotor shaft 11 are also provided on the housing of the electric motor.

Außerdem ist erfindungsgemäß an der dem Getriebe abgewandten Seite des Elektromotors nicht nur der Winkelsensor 5 sondern auch eine elektromagnetisch betätigbare Bremse angeordnet, deren Bremsspule 6 mit dem Gehäuse des Elektromotors und somit auch mit dem Statorgehäuseteil 16 verbunden ist.In addition, according to the invention, not only the angle sensor 5 but also an electromagnetically actuated brake is arranged on the side of the electric motor facing away from the transmission, the brake coil 6 of which is connected to the housing of the electric motor and thus also to the stator housing part 16.

Als Aktivelemente zur Erzeugung des motorischen Drehmoments sind Dauermagnete 7 auf der Rotorwelle 11 angeordnet.Permanent magnets 7 are arranged on the rotor shaft 11 as active elements for generating the motor torque.

Die Rotorwelle 11 ist über ein bremsenseitiges Lager 9 im Gehäuse des Motors und über ein getriebeseitiges Lager 8 im mit dem Gehäuse des Motors verbundenen Lagerflansch 13 gelagert.The rotor shaft 11 is mounted in the housing of the motor via a bearing 9 on the brake side and in the bearing flange 13 connected to the housing of the motor via a bearing 8 on the transmission side.

Der Lagerflansch 13 ist mit dem Getriebegehäuse 10 verbunden.The bearing flange 13 is connected to the gear housing 10.

Zwischen Lagerflansch 13 und Rotorwelle 11 ist ein Wellendichtring 12 vorgesehen, der somit das schmierölbefüllte Getriebeinnere gegen das Motorinnere abdichtet. Der Wellendichtring 12 ist im Lagerflansch angeordnet. Eine Dichtlippe des Wellendichtrings 12 läuft auf der Rotorwelle 11.A shaft sealing ring 12 is provided between the bearing flange 13 and the rotor shaft 11, which seals the inside of the gear unit, which is filled with lubricating oil, from the inside of the motor. The shaft sealing ring 12 is arranged in the bearing flange. A sealing lip of the shaft sealing ring 12 runs on the rotor shaft 11.

Bei eventuellem Versagen des Wellendichtrings 12 dringt Schmieröl an der Rotorwelle 11 entlang ins Motorinnere.In the event of a failure of the shaft sealing ring 12, lubricating oil penetrates along the rotor shaft 11 into the interior of the motor.

Hierzu ist der Schleuderring 1 an der Rotorwelle 11 angeordnet. Das eingedrungene Schmieröl muss somit am Schleuderring 1 entlang nach radial außen laufen. Da auf höherem Radialabstand aber größere Umfangsgeschwindigkeiten herrschen, wird das Öl von dort abgeschleudert.For this purpose, the slinger 1 is arranged on the rotor shaft 11. The lubricating oil that has penetrated must therefore run radially outward along the slinger 1. However, since greater circumferential speeds prevail at a higher radial distance, the oil is thrown off from there.

Das abgeschleuderte Öl wird erfindungsgemäß in einer in Umfangsrichtung umlaufenden Rinne des Ableitrings 2 aufgefangen. Von dieser Rinne ist erfindungsgemäß nach radial außen eine Bohrung 15 angeordnet, die in einen Kanal 14 eines mit dem Lagerflansch 13 schraubverbundenen erfindungsgemäßen Nippels 17 mündet. An der Außenseite des Nippels 17 ist erfindungsgemäß ein Schlauch zur weiteren Ableitung des Öls vorgesehen. Hierbei ist es erfindungsgemäß ermöglicht, einen Sensor zur Detektion des ausgetretenen Öls am Ableitring 2, am Kanal 14 oder an der Bohrung 15 vorzusehen, so dass bei ausgetretenem und abgeleitetem Öl dieser Sensor erfindungsgemäß als Leckage-Sensor betreibbar ist.According to the invention, the thrown-off oil is collected in a circumferential groove of the discharge ring 2. According to the invention, a bore 15 is arranged radially outward from this channel, which opens into a channel 14 of a nipple 17 according to the invention which is screw-connected to the bearing flange 13. According to the invention, a hose is provided on the outside of the nipple 17 for further drainage of the oil. According to the invention, it is possible here to provide a sensor for detecting the leaked oil on the discharge ring 2, on the channel 14 or on the bore 15, so that this sensor can be operated as a leakage sensor according to the invention in the case of leaked and drained oil.

Vorteiligerweise ist somit verhindert, dass Öl in den Bereich der Bremse oder in den Bereich des Winkelsensors 5 gelangt. Eine Fehlfunktion derselben ist somit auch verhindert.This advantageously prevents oil from getting into the area of the brake or the area of the angle sensor 5. A malfunction of the same is thus also prevented.

Damit auch bei undichtem Wellendichtring 12 und ausgeschaltetem Motor das Öl abgeleitet wird, weist der Schleuderring 1 eine Außenkontur mit Schräge auf. Hierzu wächst also der größte Radialabstand an der Oberfläche des Schleuderrings 1, insbesondere zumindest in dessen radial äußeren Endbereich, mit axial zunehmender Entfernung vom Getriebe, also von der Abtriebsseite des Motors, an, insbesondere monoton oder gar streng monoton.So that the oil is drained off even when the shaft sealing ring 12 is leaking and the engine is switched off, the slinger 1 has an outer contour with a bevel. For this purpose, the greatest radial distance on the surface of the slinger 1, in particular at least in its radially outer end region, increases with increasing axial distance from the transmission, i.e. from the output side of the motor, in particular monotonically or even strictly monotonously.

Erfindungsgemäß ist hierbei das Getriebe höher als die Bremse angeordnet, erfindungsgemäß also die Rotorwellenachse im Wesentlichen parallel zur Gravitationsachse.According to the invention, the transmission is arranged higher than the brake, so according to the invention the rotor shaft axis is essentially parallel to the axis of gravity.

An der vom Getriebe beziehungswiese von der Abtriebsseite abgewandten Seite des Schleuderrings 1 ist eine umlaufende Vertiefung, insbesondere Nut, angeordnet. Dieser Nut axial gegenüberstehend ist eine Erhebung des Ableitrings 2 zugeordnet.A circumferential recess, in particular a groove, is arranged on the side of the slinger 1 facing away from the gear or the output side. An elevation of the diverting ring 2 is assigned axially opposite this groove.

Von dieser Erhebung ausgehend weist der Ableitring 2 als Rinne eine Kontur auf, bei der der Radialabstand mit zunehmender axialen Entfernung vom Getriebe oder von der Antriebsseite monoton oder gar streng monoton zunimmt.Starting from this elevation, the discharge ring 2 has a contour as a channel in which the radial distance increases monotonically or even strictly monotonically with increasing axial distance from the gear or from the drive side.

Somit ist eine Sicherheit gegen bei Leckage des Wellendichtrings austretendes Öl geschaffen.This provides security against oil escaping in the event of a leak in the shaft sealing ring.

Bei einem weiteren bevorzugten Ausführungsbeispiel sind zur weiteren Erhöhung der Sicherheit mehrere Schleuderringe 1 axial hintereinander angeordnet.In a further preferred embodiment, several slinger rings 1 are arranged axially one behind the other to further increase safety.

BezugszeichenlisteList of reference symbols

  1. 1 Schleuderring1 slinger
  2. 2 Ableitring2 discharge ring
  3. 3 Steckverbinderteil3 connector part
  4. 4 Steckverbinderteil4 connector part
  5. 5 Winkelsensor5 angle sensor
  6. 6 Bremsspule der elektromagnetisch betätigbaren Bremse6 Brake coil of the electromagnetically actuated brake
  7. 7 Dauermagnete7 permanent magnets
  8. 8 Lager8 bearings
  9. 9 Lager9 bearings
  10. 10 Getriebegehäuse10 gear housing
  11. 11 Rotorwelle11 rotor shaft
  12. 12 Wellendichtring12 shaft seal
  13. 13 Lagerflansch13 bearing flange
  14. 14 Kanal14 channel
  15. 15 Bohrung15 hole
  16. 16 Statorgehäuse16 stator housing
  17. 17 Nippel17 nipples

Claims (5)

  1. A drive, comprising a geared motor,
    wherein the geared motor has an electric motor and a gear unit, wherein an angular sensor and also an electromagnetically actuatable brake, the brake coil of which is connected to the housing of the electric motor and hence also to the stator housing part (16), is arranged on that side of the electric motor which faces away from the gear unit, wherein the rotor shaft (11) is mounted in a bearing flange (13) by way of a bearing (8) and
    is sealed off from the bearing flange (13) by means of a shaft sealing ring (12) provided on the bearing flange (13),
    wherein oil is provided on the output side,
    wherein a thrower ring (1) is connected non-rotatably to the rotor shaft (11), with which ring a discharge ring (2) connected to a housing part is associated,
    wherein the thrower ring (1) is arranged axially on that side of the shaft sealing ring (12) which faces the rotor of the electric motor,
    wherein the rotor-shaft axis is oriented substantially parallel to the gravitational axis,
    wherein
    the thrower ring (1) has on its surface which faces the shaft sealing ring (12) such an incline that the radial distance of the surface with increasing axial distance from the shaft sealing ring (12) increases monotonically or strictly monotonically up to that surface point which is at the greatest radial distance,
    wherein a discharge ring is provided,
    wherein the discharge ring forms a channel which runs around in the peripheral direction, in which the thrown-off oil is collected,
    wherein a bore (15) is arranged radially outwards from said channel, which bore opens into a duct (14) of a nipple (17) screw-connected to the bearing flange (13), wherein a hose for further discharging of the oil is provided on the outside of the nipple (17), wherein a sensor for detecting the oil which has emerged is provided on the discharge ring (2), on the duct (14) or on the bore (15), so that in the event of oil which has emerged and been discharged said sensor can be operated as a leakage sensor, wherein the gear unit is arranged higher than the brake.
  2. A drive according to claim 1,
    characterised in that
    the thrower ring (1) has an annular depression on its surface which faces away from the shaft sealing ring (12),
    in particular into which an elevation, projecting at least in the axial direction, of the discharge ring (2) at least partially extends.
  3. A drive according to at least one of the preceding claims,
    characterised in that
    the discharge ring (2) on its side facing the shaft sealing ring (12) has an encircling depression into which a bore (15) arranged in the bearing flange (13) opens.
  4. A drive according to at least one of the preceding claims,
    characterised in that
    the thrower ring (1), at least on its side facing the shaft sealing ring (12), is formed in a cone-shape.
  5. A drive according to at least one of the preceding claims,
    characterised in that
    the rotor of the electric motor has a permanent magnet and/or a squirrel cage as an active part.
EP12798610.7A 2011-12-21 2012-11-29 Drive unit comprising a geared motor Active EP2795768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011121786.3A DE102011121786B4 (en) 2011-12-21 2011-12-21 Drive, including gear motor with centrifugal disc to seal against oil ingress
PCT/EP2012/004925 WO2013091769A2 (en) 2011-12-21 2012-11-29 Drive unit comprising a geared motor

Publications (2)

Publication Number Publication Date
EP2795768A2 EP2795768A2 (en) 2014-10-29
EP2795768B1 true EP2795768B1 (en) 2021-04-28

Family

ID=47326050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12798610.7A Active EP2795768B1 (en) 2011-12-21 2012-11-29 Drive unit comprising a geared motor

Country Status (3)

Country Link
EP (1) EP2795768B1 (en)
DE (1) DE102011121786B4 (en)
WO (1) WO2013091769A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202958A1 (en) * 2016-02-25 2017-08-31 Robert Bosch Gmbh Electric machine, and gear drive unit containing such a machine
DE102021108197A1 (en) 2021-03-31 2022-10-06 Bayerische Motoren Werke Aktiengesellschaft Rotor shaft for a rotor of an electrical machine, electrical machine and motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE353322C (en) * 1917-06-12 1922-05-12 Melms & Pfenninger Komm Ges Device for sealing a shaft guided through two spaces
US6376949B1 (en) * 2000-09-21 2002-04-23 Richard R. Hayslett Electric motor fluid drainage interface

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56150943A (en) 1980-04-23 1981-11-21 Mitsubishi Electric Corp Vertical type variable-speed motor
US4689511A (en) 1986-03-31 1987-08-25 Emerson Electric Co. Drain assembly for an electric motor
JPH02104753U (en) * 1989-02-06 1990-08-21
JPH06253495A (en) * 1993-02-25 1994-09-09 Toshiba Corp Bearing for vertical electric rotating machine
DE102005009601B4 (en) * 2005-02-28 2009-04-02 Sew-Eurodrive Gmbh & Co. Kg Drive and method for monitoring this drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE353322C (en) * 1917-06-12 1922-05-12 Melms & Pfenninger Komm Ges Device for sealing a shaft guided through two spaces
US6376949B1 (en) * 2000-09-21 2002-04-23 Richard R. Hayslett Electric motor fluid drainage interface

Also Published As

Publication number Publication date
DE102011121786B4 (en) 2020-06-04
EP2795768A2 (en) 2014-10-29
DE102011121786A1 (en) 2013-06-27
WO2013091769A2 (en) 2013-06-27
WO2013091769A3 (en) 2014-04-10

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